Vat coloring-matter.



UNITED sTArns PATENT OFFICE. I

JOSEPH DEINET, 0F .EL BERFELD, GERMANY, .ASSIG-IQ'OR TO FARBENFABRIKEN VORM. FRIEDR. BAYER & CO., OF ELBERFELD, GERMANY, A'CORPORATION OF GERMANY.

VAT COLORING-MATTER.

No Drawing.

To all whom it may concern:

Be it known that I, JOSEPH DEINET, citizen of the German Empire, residing at Elberfeld, Germany, have invented new and useful Improvements in Vat Coloring-Matter, of which the following is a specification.

My invention relates tothe production of a new anthracene derivative. It is obtained by converting the 1.5-diaminoanthraquinone into its dibenzoylated derivative. The reaction is carried out by treating 1.5-diaminoanthraquinone with benzoyl chlorid.

Example: 10 parts of l.5-di'aminoanthraquiuone are heated to boiling for about half an hour with 100 parts of nitrobenzene and 40 parts of benzoyl chlorid. ,The new condensation product crystallizes from the cooling liquid in the shape of orange crystals which are filtered off and dried. It is soluble in pyridin witha yellow color, in concentrated sulfuric acid with a red color. By

treatment with hydrosulfite and NaOH a Specification of-Letters Patent.

Application filed May 15, 19091 Serial No. 496,114.

Patented Nov. 2, 1909.

the anthracene series which is the 1.5-dibenzoyldiaminoanthraquinone, -which dyestufi 1s, after being-dried and pulverized, an

orange powder which issoluble in pyridin wlth a yellow color; soluble in concentrated my hand in the presence of two subscribing witnesses.

JOSEPH DEINET. [1 s] Witnesses O'r'ro K6NIG,. 'C. J. WRIGHT. 

